JP2019202362A - Corotation prevention tool - Google Patents

Abstract

To improve workability required for work for fastening or loosening a bolt and a nut.SOLUTION: A corotation prevention tool 100 is constituted for fixing a position by a fixing member 120 threadedly engaging one plate-like member 111 with a screw hole of penetrating through the other plate-like member 112 along the plate thickness direction, by fitting a head part of a bolt in a recessed part 114 provided in the one plate-like member 111 among the pair of plate-like members 111 and 112 connected via a connection member 113 by being oppositely arranged at a prescribed distance. Thus, a nut can be operated by a single operator without requiring the operator for pressing down the head part of the bolt, so that cost required for work can be restrained by improving workability required for work for fastening or loosening the bolt and the nut.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an anti-rotation device used for tightening or loosening bolts and nuts.

  Steel towers for power transmission and the like are assembled by fixing steel tower members such as angle steel using bolts and nuts. A large number of bolts and nuts are used in a steel tower whose height exceeds several tens of meters. In recent years, in existing steel towers, life is often extended by rust-proof coating to reduce costs.

  In steel towers with anti-corrosion coating, the coatings are also attached to the bolts and nuts. Therefore, when replacing or dismantling the steel tower components, the steel towers adhered to the nuts when they were loosened. There was a case where a so-called “circulation” in which the bolt and the bolt were rotated together by being pulled by the coating film occurred.

  Such an arrangement sometimes occurred even in a new steel tower. Specifically, normally, when assembling a new steel tower, a nut is tightened using a torque wrench until the tightening torque reaches a specified value. In steel tower members, the plating thickness on the surface may vary. For example, due to such variations, rotation of the bolt may occur before the tightening torque reaches a specified value.

  If forcibly tightening until the tightening torque reaches the specified value in a state where rotation is occurring, the surface plating of the steel tower member may be scraped, and if the plating is scraped, the strength of the steel tower This leads to a decrease in quality, such as a decrease and durability.

  When the rotation occurs, it is difficult to tighten or loosen the nut by pressing the bolt with only the hand of the operator. For this reason, conventionally, when rotation occurs, it has been necessary to perform work while holding two tools, a tool for turning the nut and a tool for holding the bolt, at the top of the steel tower. Such work may not be able to exert a great force depending on the posture of the worker, and if it is difficult for one person to work, work with two people: a worker who turns the nut and a worker who holds the bolt Has to be done and is troublesome.

  For the purpose of eliminating such problems, conventionally, specifically, for example, from one side around the mouth provided with a fitting hole that fits into the head of the bolt, outward in the radial direction of the fitting hole. There has been a technique related to a co-rotation (spinning) prevention jig provided with an arm portion that extends and has an arm portion that makes contact with a steel tower member and a bolt head that are close to a free end (see, for example, Patent Document 1 below).

  Further, for the purpose of eliminating such problems, conventionally, specifically, for example, a socket portion having a bottomed hole portion that fits in the head portion of the bolt, and a radial direction of the hole portion from the peripheral surface of the socket portion There has been a technique related to a bolt / nut rotation prevention device including an arm portion that extends outward and includes a magnet (see, for example, Patent Document 2 below).

JP 2012-115949 A JP 2009-34733 A

  However, as described above, in order to prevent the rotation, the conventional technique of holding two tools, a tool for turning a nut and a tool for holding a bolt, is inferior in workability and requires a long working time. There was a problem that it took.

  In addition, as described above, the conventional technique of performing work by two people, an operator who turns the nut and an operator who holds the bolt, can surely prevent the rotation, but can be done by one person originally. There is a problem that two workers have to perform possible work, double the number of workers, and increase the cost of the entire work.

  Moreover, in the location where the some member is connected, there existed a situation where the tool which presses a bolt interferes with another member, and cannot hold down a bolt.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an anti-rotation device that can improve the workability of the work of tightening or loosening bolts and nuts in order to eliminate the above-described problems caused by the prior art.

  In order to solve the above-described problems and achieve the object, the anti-rotation device according to the present invention has a pair of plate-like members, one end of which is connected to the connecting member, and is arranged opposite to each other along the thickness direction with a predetermined distance. A holding portion provided with a member; and a recess provided on one plate-like member of the pair of plate-like members and recessed from the other end of the one plate-like member toward the connecting member; and the pair of plate-like members The other plate-like member of the members penetrates the other plate-like member along the plate thickness direction, and is movable along the opposing direction of the other plate-like member and the one plate-like member. And a fixing member.

  Further, in the above-described invention, the pair of plate-like members are different in length from the connecting member, and the one plate-like member is more than the other plate-like member. Also, the length from the connecting member is long, and the fixing member is provided at a position that does not overlap the concave portion in the opposing direction of the pair of plate-like members.

  In the anti-rotation device according to the present invention, in the above invention, the fixing member is screwed into a screw hole penetrating the other plate-like member along the plate thickness direction. It is characterized by being a screw.

  Further, in the above-described invention, the anti-rotation device according to the present invention penetrates the other plate-shaped member along the plate thickness direction, and the depth of the concave portion along the plate surface of the other plate-shaped member. A long hole whose longitudinal direction is a direction intersecting the vertical direction, and an annular member that is movable along the longitudinal direction of the long hole and is detachably attached to the long hole, and the fixing member The screw is screwed into a screw hole penetrating the annular member along the plate thickness direction.

  Further, the anti-rotation device according to the present invention is the hand rotation device according to the above invention, wherein the fixing member is provided with a gripping portion at an end opposite to one of the pair of plate members. It is a screw.

  Further, in the above-described invention, the anti-rotation device according to the present invention is characterized in that the fixing member is a thumbscrew.

  Further, in the above-mentioned invention, the anti-rotation device according to the present invention is such that the fixing member is provided at an end portion on the one plate-like member side and is parallel to the plate surface of the one plate-like member. An abutting member having an abutting surface larger than a cross-sectional area perpendicular to the axis of the fixing member is provided.

  According to the rotation prevention tool concerning this invention, there exists an effect that the workability | operativity concerning the operation | work which tightens or loosens a bolt and a nut can be aimed at.

It is explanatory drawing (the 1) which shows the structure of the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 2) which shows the structure of the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 3) which shows the structure of the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 4) which shows the structure of the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 1) which shows an example of the operation | work using the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 2) which shows an example of the operation | work using the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 3) which shows an example of the operation | work using the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 4) which shows an example of the operation | work using the rotation prevention tool of Embodiment 1 concerning this invention. It is explanatory drawing (the 1) which shows the structure of the rotation prevention tool of Embodiment 2 concerning this invention. It is explanatory drawing (the 2) which shows the structure of the rotation prevention tool of Embodiment 2 concerning this invention. It is explanatory drawing (the 3) which shows the structure of the rotation prevention tool of Embodiment 2 concerning this invention.

  Exemplary embodiments of an anti-rotation device according to the present invention will be described below in detail with reference to the accompanying drawings.

<Embodiment 1>
(Configuration of anti-rotation device)
First, the structure of the rotation prevention tool of Embodiment 1 concerning this invention is demonstrated. 1-4 is explanatory drawing which shows the structure of the rotation prevention tool of Embodiment 1 concerning this invention. In FIG. 1, the perspective state of the rotation prevention tool of Embodiment 1 concerning this invention is shown. 2 shows a view as seen from an arrow A in FIG. 1, FIG. 3 shows a view as seen from an arrow B in FIG. 1, and FIG. 4 shows a view as seen from an arrow C in FIG.

  As shown in FIGS. 1 to 4, the anti-rotation device 100 according to the first embodiment of the present invention includes a holding part 110 and a fixing member 120. The holding unit 110 includes a pair of plate-like members 111 and 112. Each of the pair of plate-like members 111 and 112 has a substantially rectangular flat plate shape. The pair of plate-like members 111 and 112 are connected to the connecting member 113 at one end.

  The holding part 110 can be formed, for example, by processing a plate-like member into a “U” shape. Thus, by integrally forming the pair of plate-like members 111 and 112 and the connecting member 113, the holding part 110 can be easily formed, and the strength of the holding part 110 can be ensured. .

  The pair of plate-like members 111 and 112 have different lengths from the connecting member 113. Specifically, one plate-like member 111 of the pair of plate-like members 111 and 112 is longer from the connecting member 113 than the other plate-like member 112 of the pair of plate-like members 111 and 112. Is long.

  One plate-like member 111 is provided with a recess 114. The recess 114 is recessed from the other end of the one plate-like member 111 toward the connecting member 113. The recess 114 has a rectangular shape in which the opposing sides 301 and 302 are parallel. The dimension between the opposing sides 301, 302, that is, the width dimension of the recess 114 is equal to or slightly larger than the opposite dimension of the head of the bolt to be operated using the anti-rotation tool 100 (for example, , See FIG.

  The other plate-like member 112 is provided with a fixing member 120. The fixing member 120 can be realized by, for example, a screw that is screwed into a screw hole that penetrates the other plate-like member 112 along the plate thickness direction. The fixing member 120 can be moved along the opposing direction of the one plate-like member 111 and the other plate-like member 112 by adjusting the screwing position with respect to the screw hole, and is fixed at the moved position. Can do.

  Specifically, it is preferable that the fixing member 120 is realized by, for example, a hand screw (knob screw) such as a thumb screw (wing bolt). Alternatively, the fixing member 120 may be realized by, for example, a hand screw such as a knurled screw (knurl bolt) or a knob screw (knob bolt).

  The thumbscrew includes a butterfly wing-like wing 123 on a head 122 provided at one end of the shaft 121. The wing 123 has various shapes such as an arc shape and a rectangular shape, and all of them protrude in a direction away from the shaft portion 121 and away from the axis. By realizing the fixing member 120 with a hand screw, the position of the fixing member 120 can be easily adjusted without using a tool.

  The fixing member 120 is provided at a position that does not overlap with the recess 114 in the facing direction of the pair of plate-like members 111 and 112. In addition, the fixing member 120 includes a contact member 125 at an end portion of the shaft portion 121 on the one plate-like member 111 side. The contact member 125 is provided with a contact surface that faces the one plate-like member 111 and is parallel to the plate surface of the one plate-like member 111. The area of the contact surface is larger than the area of a cross section obtained by cutting the axis of the fixing member 120 by a surface orthogonal to the axial direction.

  Specifically, for example, the contact member 125 is configured to screw a cap-like member having a thread formed on the inner peripheral surface thereof to be threaded with the thread of the shaft portion 121 from the side opposite to the head 122. It can attach to the axial part 121 by this. Accordingly, the contact member 125 having an outer diameter larger than the inner diameter of the screw hole provided in the other plate-like member 112 can be attached after the fixing member 120 is attached to the other plate-like member 112.

  The contact member 125 can be formed using a metal material, for example. Alternatively, the contact member 125 may be formed using, for example, a synthetic resin such as hard rubber or hard urethane. The contact member 125 is formed of a cap-shaped member formed using a metal material, and a surface on the one plate-shaped member 111 side of the cap-shaped member using rubber, silicon, urethane, or the like. It may be formed by pasting a sheet-like member.

  The other plate-like member 112 is provided with a through-hole 112a that penetrates the other plate-like member 112 along the plate thickness direction. The through-hole 112a can pass the string for fall prevention, for example. Thereby, the fall prevention of the rotation prevention tool 100 can be aimed at, without complicating the structure of the rotation prevention tool 100. FIG.

(An example of work using the travel prevention tool 100)
Next, an example of work using the anti-rotation tool 100 will be described. 5-8 is explanatory drawing which shows an example of the operation | work using the rotation prevention tool 100 of Embodiment 1 concerning this invention. As an operation using the anti-rotation tool 100, as will be described with reference to FIGS. The operation of loosening 701 will be described.

  In such an operation, first, the fixing member 120 is rotated in the loosening direction, and the distance between the tip of the fixing member 120 and the one plate-like member 111 is set to the tower member 501 to which the anti-rotation device 100 is attached. Make it wider than the thickness. Then, as shown in FIGS. 5 and 6, the steel tower member 501 is sandwiched between the pair of plate-like members 111 and 112, and the head of the bolt 502 to be loosened is positioned inside the recess 114. The rotation prevention tool 100 is attached to the steel tower member 501.

  As the anti-rotation tool 100, one having a recess 114 having a width dimension equivalent to the opposite dimension of the bolt 502 to be loosened is used. And when attaching the rotation prevention tool 100 to the steel tower member 501, the rotation prevention tool 100 is moved to the head side of the bolt 502 until the head of the bolt 502 comes into contact with the bottom of the recess 114 (the wall at the end). Fit into. Thereby, rattling between the head of the bolt 502 and the rotation prevention tool 100 can be suppressed, and problems such as breakage of the bolt 502 can be prevented.

  Next, as shown by an arrow 700 in FIG. 7, the fixing member 120 is rotated in the tightening direction. The fixing member 120 is rotated in the direction in which the abutting member 125 at the tip abuts against the tower member 501 and is tightened. As a result, the steel tower member 501 is sandwiched between the contact member 125 and the one plate-like member 111, and the anti-rotation tool 100 does not fall off the steel tower member 501 even if the operator releases his / her hand.

  When working on electrical equipment such as a steel tower, workers wear protective gloves to protect the workers from electric shock. By realizing the fixing member 120 by a hand screw such as a thumbscrew that can be operated by hand, the rotation prevention device 100 can be attached to the tower member 501 while wearing protective gloves without using a tool. it can.

  Next, as shown by an arrow 800 in FIG. 8, a tool 801 such as a wrench or a spanner is hung on the nut 701 and the tool 801 is operated to rotate the nut 701 in a loosening direction. By using the anti-rotation tool 100, one operator can operate the tool 801 using both hands.

  When the rotation of the bolt 502 and the nut 701 occurs when starting to loosen the nut 701, the rotation prevention device 100 in which the recess 114 is fitted into the head of the bolt 502 rotates together with the bolt 502. The rotation of the anti-rotation device 100 is restricted from further rotation by the connection member 113 coming into contact with the steel tower member 501. Thereby, the rotation of the bolt 502 can be reliably prevented and the nut 701 can be loosened.

  In the operation of tightening the nut 701, first, in the same manner as the operation of loosening the nut 701, the steel tower whose distance between the tip of the fixing member 120 and the one plate-like member 111 is to be attached to the anti-rotation device 100 is set. It is made wider than the thickness of the member 501. Then, the steel tower member 501 is sandwiched between the pair of plate-like members 111 and 112, and the fixing member 120 is tightened in a state where the head of the bolt 502 to be tightened is positioned inside the recess 114. Rotate.

  Next, a tool 801 such as a wrench or a spanner is hung on the nut 701 and the tool 801 is operated to rotate the nut 701 in a tightening direction. By using the anti-rotation tool 100, one operator can operate the tool 801 using both hands. When the nut 701 is tightened, if rotation occurs between the bolt 502 and the nut 701, the rotation prevention tool 100 in which the recess 114 is fitted in the head of the bolt 502 rotates together with the bolt 502. The rotation of the anti-rotation device 100 is restricted from further rotation by the connection member 113 coming into contact with the steel tower member 501. Thereby, the rotation of the bolt 502 can be reliably prevented and the nut 701 can be tightened.

  In the steel tower, there is a portion where a plurality of steel tower members 501 are concentrated. The steel tower is configured by three-dimensionally connecting a plurality of steel tower members 501, and the extending direction of each steel tower member 501 is not uniform. In such a portion, a plurality of bolts 502 and nuts 701 connecting the steel tower members 501 are also concentrated.

  In such a portion, it may be difficult to hang the two tools 801, which are a tool 801 for turning the nut 701 and a tool 801 for holding the bolt 502, on the bolt 502 and the nut 701 to be worked. . In particular, in the case of replacing some steel tower members 501 in an existing steel tower, a sufficient space is secured for applying two tools 801, a tool 801 for turning the nut 701 and a tool 801 for holding the bolt 502. Sometimes it was difficult.

  On the other hand, according to the rotation prevention tool 100, since it is a simple structure, thickness reduction and size reduction can be achieved, and rotation can be reliably prevented even in a place where a plurality of steel tower members 501 are complicated. it can.

  As described above, the rotation preventing device 100 according to the first embodiment of the present invention has a pair of plate-like members whose one ends are connected to the connecting member 113 and are arranged to face each other in the thickness direction at a predetermined distance. The holding part 110 provided with the members 111 and 112 is provided on one plate-like member 111 of the pair of plate-like members 111 and 112, and is recessed from the other end of the one plate-like member 111 to the connecting member 113 side. The concave plate 114 and the other plate-like member 112 of the pair of plate-like members 111, 112 penetrate the other plate-like member 112 along the plate thickness direction, and the other plate-like member 112 and one plate And a fixing member 120 that is movable along a direction facing the shaped member 111.

  According to the rotation preventing device 100 of the first embodiment of the present invention, the bolt 502 to be loosened and the head of the bolt 502 in the nut 701 are fitted into the recess 114 in the rotation preventing device 100 so that the bolt The nut 701 can be operated in a state where the member fixed by 502 and the nut 701 is sandwiched between the pair of plate-like members 111 and 112.

  Thereby, the nut 701 can be operated by one worker without requiring a worker who holds the head of the bolt 502. As a result, the workability of the work of tightening or loosening the bolt 502 and the nut 701 can be improved, and the cost of the work can be reduced.

  Further, according to the rotation preventing device 100 of the first embodiment of the present invention, in a situation where a space for inserting the tool 801 for pressing the head of the bolt 502 and the operator's hand supporting the tool 801 cannot be secured. However, if there is a space for inserting the anti-rotation tool 100, the operator can operate the nut 701 without requiring an operator to hold down the head of the bolt 502.

  As a result, the nut 701 can be operated while fixing the head of the desired bolt 502 even at a location where the plurality of bolts 502 and the nut 701 are concentrated. Therefore, the operation of tightening or loosening the bolt 502 and the nut 701 is performed. Therefore, it is possible to improve the workability and reduce the work cost.

  As described above, according to the anti-rotation device 100 of the first embodiment of the present invention, the workability of the work of tightening or loosening the bolt 502 and the nut 701 is improved, and the cost of the work is suppressed. Can do.

  Further, in the rotation preventing device 100 according to the first embodiment of the present invention, the pair of plate-like members 111 and 112 are different in length from the connecting member 113, and one plate-like member 111 is the other plate-like. The length from the connecting member 113 is longer than that of the member 112, and the fixing member 120 is provided at a position that does not overlap with the concave portion 114 in the opposing direction of the pair of plate-like members 111 and 112.

  According to the rotation preventing device 100 of the first embodiment of the present invention, the tool 801 for operating the nut 701 screwed into the bolt 502 having the head fitted in the recess 114 is fixed by a simple configuration. Interfering with 120 can be avoided. Thereby, the workability of tightening or loosening the bolt 502 and the nut 701 can be improved, and the cost for the work can be suppressed.

  Further, in the rotation preventing device 100 according to the first embodiment of the present invention, the fixing member 120 is screwed into a screw hole that penetrates the other plate-like member 112 along the plate thickness direction. It is characterized by being a screw to be joined.

  According to the anti-rotation device 100 of the first embodiment of the present invention, the workability of tightening or loosening the bolt 502 and the nut 701 with a simple configuration is realized by realizing the fixing member 120 with a screw. , Can reduce the cost of work.

  Further, in the anti-rotation device 100 according to the first embodiment of the present invention, the fixing member 120 has a grip portion at the end of the pair of plate members 111 and 112 opposite to the one plate member 111. It is characterized by being a hand screw equipped with The hand screw can be realized by, for example, a knurled screw (knurl bolt) or a knob screw (knob bolt).

  According to the rotation prevention tool 100 of Embodiment 1 according to the present invention, the operator can operate the fixing member 120 by hand without using the tool 801. Thereby, the workability of tightening or loosening the bolt 502 and the nut 701 can be improved, and the cost for the work can be suppressed.

  Further, the rotation preventing device 100 according to the first embodiment of the present invention is characterized in that the fixing member 120 is a thumbscrew.

  According to the rotation preventing device 100 of the first embodiment of the present invention, the operator uses the tool 801 even when wearing a protective glove by using the thumbscrew provided with the wing 123 that is easy to grasp. Can be easily operated without any problems. Thereby, the workability of tightening or loosening the bolt 502 and the nut 701 can be improved, and the cost for the work can be suppressed.

  Further, in the anti-rotation device 100 according to the first embodiment of the present invention, the fixing member 120 is provided at the end portion on the one plate-like member 111 side, and is parallel to the plate surface of the one plate-like member 111. And a contact member 125 having a contact surface larger than the cross-sectional area perpendicular to the axis of the fixing member 120.

  According to the rotation prevention device 100 of the first embodiment of the present invention, the rotation prevention device 100 is pressed against the member to be attached to the rotation prevention device 100 such as the steel tower member 501 by preventing the rotation of the fixing member 120. Compared with the case where the tool 100 is fixed, the contact area with respect to the member can be increased, and the anti-rotation tool 100 can be reliably fixed to the member.

  Accordingly, it is possible to prevent problems such as dropping of the anti-rotation device 100 while the bolt 502 and the nut 701 are tightened or loosened, and to improve workability of tightening or loosening the bolt 502 and the nut 701. Can reduce the cost of work.

  In addition, the contact member 125 is formed using a synthetic resin such as hard rubber or hard urethane, or the contact member 125 formed of rubber, silicon, urethane, or the like is attached to the distal end of the fixing member 120 to be tightened. The fixing member 120 that is screwed to the tower member 501 can be deformed according to the surface shape of the tower member 501. As a result, the fixing by the fixing member 120 can be reliably performed, and the workability of tightening or loosening the bolt 502 and the nut 701 can be improved.

<Embodiment 2>
(Configuration of anti-rotation device)
First, the structure of the rotation prevention tool of Embodiment 2 concerning this invention is demonstrated. The same parts as those of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. 9-11 is explanatory drawing which shows the structure of the rotation prevention tool of Embodiment 2 concerning this invention.

  In FIG. 9, the perspective state which decomposed | disassembled the rotation prevention tool of Embodiment 2 concerning this invention is shown. FIG. 10 shows a side view of the rotation preventing device according to the second embodiment of the present invention, and FIG. 11 shows one mode when the rotation preventing device according to the second embodiment of the present invention is used.

  As shown in FIGS. 9 to 11, the anti-rotation device 900 according to the second embodiment of the present invention includes a pair of plate-like members 111 and 112 connected via a connecting member 113. One plate-like member 111 of the pair of plate-like members 111 and 112 has a longer length from the connecting member 113 than the other plate-like member 112 of the pair of plate-like members 111 and 112.

  The other plate-like member 112 is provided with a long hole 901 that has the width direction of the other plate-like member 112 as the longitudinal direction and penetrates the other plate-like member 112 in the plate thickness direction. The longitudinal direction of the long hole 901 intersects the depth direction of the recess 114. Specifically, the longitudinal direction of the long hole 901 is orthogonal to the depth direction of the recess 114.

  Even if the long hole 901 has a tapered shape such that the width of one plate-like member 111 side of the other plate-like member 112 is narrower than the wing 123 side of the thumbscrew that realizes the fixing member 120. Good. In this case, the taper is not limited to the one that is inclined so much that an operator or the like can easily recognize it visually. A groove 902 that penetrates in the thickness direction of the other plate-like member 112 is provided at the periphery of the long hole 901.

  An annular member 903 having a through hole 903a penetrating along the axial direction can be removably attached to the long hole 901. On the inner peripheral surface of the annular member 903, a screw thread that is screwed with the screw thread of the shaft portion 121 of the fixing member 120 is formed. That is, a screw hole penetrating the annular member 903 along the plate thickness direction can be realized by the inner peripheral surface of the annular member 903 and the screw thread provided on the inner peripheral surface. The annular member 903 can be formed using a synthetic resin called plastic or the like.

  The outer dimension of the annular member 903 is equivalent to the width dimension of the long hole 901. When the long hole 901 has a tapered shape inclined in the depth direction, the annular member 903 formed by using synthetic resin or the like is fitted into the long hole 901 so that the annular member 903 is inserted into the long hole 901. The annular member 903 is elastically deformed by the contact force between the wall surface and the outer surface of the annular member 903, and the position of the annular member 903 relative to the other plate-like member 112 can be fixed.

  Alternatively, even when the long hole 901 is not tapered, by making the outer dimension of the annular member 903 slightly larger than the width dimension of the hole, the annular member 903 is fitted into the long hole 901, so that the synthetic resin or the like The annular member 903 formed using the elastic member deforms the annular member 903 elastically by the contact force between the inner wall surface of the elongated hole 901 and the outer surface of the annular member 903, and fixes the position of the annular member 903 with respect to the other plate-like member 112 can do. In any case, the annular member 903 is not limited to one that is greatly deformed to such an extent that an operator or the like can easily recognize it visually.

  The annular member 903 includes a protrusion 903b that protrudes outward on the outer peripheral surface. The annular member 903 is fitted into the long hole 901 in a state where the protrusion 903b is fitted into any one of the plurality of grooves 902 provided at the periphery of the long hole 901. Accordingly, the position of the annular member 903 in the longitudinal direction in the long hole 901 is fixed by fitting the protrusion 903b into any one of the plurality of grooves 902 provided on the periphery of the long hole 901. be able to. In addition, this makes it possible to prevent the rotating member from rotating in the long hole 901 when the fixing member 120 is rotated with respect to the annular member 903 and the screwing amount is adjusted.

  In addition, the fixing member 120 includes a contact member 125 as in the first embodiment. By providing the contact member 125, the fixing member 120 can be reliably brought into contact with the steel tower member 501, and the rotation prevention tool 900 can be reliably attached to the steel tower member 501.

  As described above, the rotation preventing device 900 according to the second embodiment of the present invention penetrates the other plate-like member 112 along the plate thickness direction, and follows the plate surface of the other plate-like member 112. A long hole 901 whose longitudinal direction is the direction intersecting the depth direction of the concave portion 114, and an annular member 903 that is movable along the longitudinal direction of the long hole 901 and is detachably attached to the long hole 901. The fixing member 120 is a screw that is screwed into a screw hole that penetrates the annular member 903 along the plate thickness direction.

  According to the anti-rotation device 900 of the second embodiment of the present invention, the annular member 903 is moved along the longitudinal direction of the long hole 901 so that the fastening position by the fixing member 120 is set to the other plate-like member 112. Can be adjusted in the width direction. As a result, the tightening position by the fixing member 120 can be adjusted according to the situation of the surroundings such as the position of the head of the bolt 502 to be pressed and the members located around the head of the bolt 502. In addition, the workability of tightening or loosening the nut 701 can be improved, and the cost for the work can be suppressed.

  As described above, the anti-rotation device according to the present invention is useful for the anti-rotation device used for tightening or loosening the bolts and nuts. Suitable for anti-rotation devices used for tightening or loosening the door.

DESCRIPTION OF SYMBOLS 100,900 Rotation prevention tool 110 Holding | maintenance part 111,112 Plate-shaped member 113 Connection member 114 Recessed part 120 Fixing member 121 Shaft part 122 Head 123 Wing 125 Contact member 501 Steel tower member 701 Nut

Claims (7)

One end is connected to the connecting member, and a holding portion including a pair of plate-like members arranged to face each other along the plate thickness direction with a predetermined distance therebetween,
A recess provided on one of the pair of plate-like members and recessed from the other end of the one plate-like member toward the connecting member;
The other plate-like member of the pair of plate-like members penetrates the other plate-like member along the plate thickness direction, and in the opposing direction of the other plate-like member and the one plate-like member. A fixing member movable along,
An anti-rotation device characterized by comprising: The pair of plate-like members have different lengths from the connecting member,
The one plate-like member has a longer length from the connecting member than the other plate-like member,
2. The anti-rotation device according to claim 1, wherein the fixing member is provided at a position that does not overlap with the concave portion in a facing direction of the pair of plate-like members.   3. The screw according to claim 1, wherein the fixing member is a screw that is screwed into a screw hole that penetrates the other plate-like member through the other plate-like member along the plate thickness direction. Rotation prevention tool. An elongated hole penetrating the other plate-shaped member along the plate thickness direction and having a longitudinal direction in a direction intersecting the depth direction of the recess along the plate surface of the other plate-shaped member;
An annular member movable along the longitudinal direction of the elongated hole and removably attached to the elongated hole;
With
The anti-rotation device according to claim 1, wherein the fixing member is a screw that is screwed into a screw hole that penetrates the annular member along the plate thickness direction.   The said fixing member is a hand screw which provided the holding part in the edge part on the opposite side to one plate-shaped member of a pair of said plate-shaped members, The supply of Claim 3 or 4 characterized by the above-mentioned. Anti-rotation tool.   The anti-rotation device according to claim 5, wherein the fixing member is a thumbscrew.   The fixing member is provided at an end portion on the one plate-like member side, and has a contact surface larger than a cross-sectional area that is parallel to the plate surface of the one plate-like member and orthogonal to the axis of the fixing member. The contact prevention tool according to any one of claims 3 to 6, further comprising a contact member having the contact member.

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